Quad"ric (?), a. (Math.) Of or pertaining to the second degree.
Quad"ric, n. (a) (Alg.) A quantic of the second degree. See Quantic.
(b) (Geom.) A surface whose equation in three variables is of the
second degree. Spheres, spheroids, ellipsoids, paraboloids,
hyperboloids, also cones and cylinders with circular bases, are
quadrics.
Quad`ri*cap"su*lar (?), a. [Quadri- + capsular.] (Bot.) Having four
capsules.
||Quad"ri*ceps (?), n. [NL., fr. L. qyattuor four + caput head.]
||(Anat.) The great extensor muscle of the knee, divided above into
||four parts which unite in a single tendon at the knee.
Quad`ri*cip"i*tal (?), n. (Anat.) Of or pertaining to the quadriceps.
Quad"ri*corn (?), n. [See Quadricornous.] (Zoˆl.) Any quadricornous
animal.
Quad`ri*cor"nous (?), a. [Quadri- + L. cornu horn: cf. F. quadricorne.]
(Zoˆl.) Having four horns, or hornlike organs; as, a quadricornous
beetle.
Quad`ri*cos"tate (?), a. [Quadri- + costate.] Having four ribs.
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Quad`ri*den"tate (?), a. [Quadri- + dentate.] Having four teeth; as, a
quadridentate leaf.
Quad`ri*en"ni*al (?), a. Same as Quadrennial.
Quad`ri*fa"ri*ous (?), a. [L. quadrifarius fourfold, fr. quattuor four:
cf. F. quadrifariÈ. Cf. Multifarious.] Arranged in four rows or ranks;
as, quadrifarious leaves. Loudon.
Quad"ri*fid (?), a. [L. quadrifidus; quattuor four + findere to cleave:
cf. F. quadrifide.] Divided, or deeply cleft, into four parts; as, a
quadrifid perianth; a quadrifid leaf.
{ Quad"ri*foil (?), Quad`ri*fo"li*ate (?), } a. [Quadri- + L. folium
leaf.] (Bot.) Four-leaved; having the leaves in whorls of four.
Quad`ri*fur"ca*ted (?), a. [Quadri- + furcated.] Having four forks, or
branches.
||Quad*ri"ga (?), n.; pl. QuadrigÊ (#). [L. See Quadrijugous.] (Rom.
||Antiq.) A car or chariot drawn by four horses abreast.
{ Quad`ri*gem"i*nal (?), Quad`ri*gem"i*nous (?), } a. [Quadri- + L.
gemini twins.] Fourfold; having four similar parts, or two pairs of
similar parts.
Quadrigeminal bodies (Anat.), two pairs of lobes, or elevations, on the
dorsal side of the midbrain of most mammals; the optic lobes. The
anterior pair are called the nates, and the posterior the testes.
Quad`ri*ge*na"ri*ous (?), a. [L. quadrigeni, quadringeni, four hundred
each.] Consisting of four hundred.
Quad*rij"u*gate (?), a. Same as Quadrijugous.
Quad*rij"u*gous (?), a. [L. quadrijugus of a team of four; quattuor
four + jugum yoke.] (Bot.) Pinnate, with four pairs of leaflets; as, a
quadrijugous leaf.
Quad`ri*lat"er*al (?), a. [L. quadrilaterus: cf. F. quadrilatËre,
quadrilatÈral. See Quadri- and Lateral.] Having four sides, and
consequently four angles; quadrangular.
Quad`ri*lat"er*al, n. 1. (Geom.) A plane figure having four sides, and
consequently four angles; a quadrangular figure; any figure formed by
four lines.
2. An area defended by four fortresses supporting each other; as, the
Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and
Legnano.
Complete quadrilateral (Geom.), the figure made up of the six straight
lines that can be drawn through four points, A, B, C, I, the lines
being supposed to be produced indefinitely.
Quad`ri*lat"er*al*ness, n. The property of being quadrilateral.
Quad`ri*lit"er*al (?), a. [Quadri- + literal.] Consisting of four
letters.
Qua*drille" (?), n. [F. quadrille, n. fem., fr. Sp. cuadrilla meeting
of four or more persons or It. quadriglia a band of soldiers, a sort of
dance; dim. fr. L. quadra a square, fr. quattuor four. See Quadrate.]
1. A dance having five figures, in common time, four couples of dancers
being in each set.